vxlan: document UDP default port
The default port for VXLAN is not same as IANA value.
Document this.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 9a69626..e6a3d47 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -8,7 +8,6 @@
* published by the Free Software Foundation.
*
* TODO
- * - use IANA UDP port number (when defined)
* - IPv6 (not in RFC)
*/
@@ -65,7 +64,10 @@
__be32 vx_vni;
};
-/* UDP port for VXLAN traffic. */
+/* UDP port for VXLAN traffic.
+ * The IANA assigned port is 4789, but the Linux default is 8472
+ * for compatability with early adopters.
+ */
static unsigned int vxlan_port __read_mostly = 8472;
module_param_named(udp_port, vxlan_port, uint, 0444);
MODULE_PARM_DESC(udp_port, "Destination UDP port");